There are two way the new activex control can be put on users's machines:
<installed path>/<server app [Tomcat,WebSphere]>/webapps/CAOMWebViewer12/ActiveX for example: C:\Program Files\CA\CA_OM_Web_Viewer\apache-tomcat-8.5.24\webapps\CAOMWebViewer12\ActiveX..and unzip the file to get the ERMHelper2AX.ocx
Please note that in some 64bit environments (like Windows 2008 R2/2012 R2/2016 Servers) most utilities, including the command prompt, must be run "as administrator" to insure the appropriate registering of the 32bit ActiveX Control.
The Certificate for the ActiveX Control, used for printing and MAPI emailing, expired on February 28, 2015. Under typical situations, any new user will be unable to download this control using the browser. Existing users should not be affected.